物理学报2017，Vol.66Issue(7)：73-86,14.DOI:10.7498/aps.66.070707
相位敏感型光时域反射传感系统光学背景噪声的产生机理及其抑制方法
The mechanism and suppression methods of optical background noise in phase-sensitive optical time domain reflectometry
摘要
Abstract
Phase-sensitive optical time domain reflectometry (Φ-OTDR) has the advantages of fast response and high sensitivity.Therefore,it can realize fully distributed monitoring of weak vibrations along an optical fiber,which is of great value in many applications such as perimeter security and structural health monitoring.However,the optical background noise in the Φ-OTDR will disturb the extraction of effective signals and limit the performance of this system.The optical background noise mainly includes the laser center frequency drift,the polarization-relevance noise and the distortion measurement due to the nonlinear relationship between optical fiber strain and interference intensity.In this paper,the generating mechanism of these optical background noise was analyzed and the corresponding noise suppression methods were proposed.The experiment results showed that the proposed methods could suppress the optical background noise effectively and improve the sensing performance significantly.关键词
相位敏感型光时域反射/光学背景噪声/光源频漂/偏振相关噪声Key words
phase sensitive optical time domain reflectometry/optical background noise/laser frequency drift/polarization-relevance noise引用本文复制引用
张旭苹,张益听,王峰,单媛媛,孙振敛,胡燕祝..相位敏感型光时域反射传感系统光学背景噪声的产生机理及其抑制方法[J].物理学报,2017,66(7):73-86,14.基金项目
国家自然科学基金(批准号:61627816,61540017,61405090,61307096)和北京财政支持的“城市地下基础设施的光纤检测平台”资助的课题.Project supported by the National Natural Science Foundation (Grant Nos.61627816,61540017,61405090,61307096),and the Project of Beijing Financial,China. （批准号:61627816,61540017,61405090,61307096）
